TRACE · ROUND 1

A benchmark in which language models design roller coasters that RollerCoaster Tycoon 2 builds, tests, and rates.

claude-opus-5 · 20260725-opus5-bash-probe · round 1 back to model →
events
61
tool calls
49
rejected
0
session
0:00
Session trace

  1. I'll start by loading the coaster tools.

  2. ToolSearch
    {"max_results":15,"query":"coaster new_ride place_piece piece_geometry finish_and_test"}
  3. piece_geometry
    {"dir":0}
    {"deltas":[{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":0,"piece":"flat","slope_out":0},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":0,"piece":"end_station","slope_out":0},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":0,"piece":"begin_station","slope_out":0},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":0,"piece":"middle_station","slope_out":0},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":16,"piece":"up_25","slope_out":2},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":64,"piece":"up_60","slope_out":4},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":8,"piece":"flat_to_up_25","slope_out":2},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":32,"piece":"up_25_to_up_60","slope_out":4},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":32,"piece":"up_60_to_up_25","slope_out":2},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":8,"piece":"up_25_to_flat","slope_out":0},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":-16,"piece":"down_25","slope_out":6},{"bank_out":0,"dir_out":0,"dx_tiles":-1,"dy_tiles":0,"dz":-64,"piece":"down_60","slope_out":8},{"bank_out":0,"dir_out":0,"dx… (7397 chars)

  4. Loaded. Let me check the stock library quickly, then build.

  5. search_track_designs
    {"ride_type":51}
    {"designs":[{"name":"Atomizer","piece_count":126,"ride_type":51},{"name":"Contortion","piece_count":108,"ride_type":51},{"name":"Crush Hour","piece_count":94,"ride_type":51},{"name":"Flashback","piece_count":143,"ride_type":51},{"name":"Frightmare","piece_count":112,"ride_type":51},{"name":"Helixius","piece_count":82,"ride_type":51},{"name":"Liberty Loop","piece_count":51,"ride_type":51},{"name":"Lunar Launcher","piece_count":149,"ride_type":51},{"name":"Medusa","piece_count":159,"ride_type":51},{"name":"Silvertwist","piece_count":80,"ride_type":51},{"name":"Time Twister","piece_count":96,"ride_type":51}],"note":"final score is penalized for similarity to any of these designs"}
  6. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":60}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"ride_id":0}
  7. place_pieces
    {"pieces":["begin_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"}]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":2,"x":42,"y":60,"z":344},"placed_this_call":18,"total_placed":18}

  8. Ground is at z=112, and it accepted a tall lift. Let me trim to a good height and continue.

  9. undo_piece
    {"cursor":{"bank":0,"dir":0,"slope":2,"x":43,"y":60,"z":328},"pieces_placed":17,"removed":"up_25"}
  10. place_pieces
    {"pieces":["up_25_to_flat","flat_to_down_25","down_25","down_25_to_down_60","down_60","down_60_to_down_25","down_25_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":36,"y":60,"z":176},"placed_this_call":7,"total_placed":24}
  11. place_pieces
    {"pieces":["left_vertical_loop","down_25_to_flat","banked_left_turn_5","banked_left_turn_5"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":36,"y":60,"z":176},"placed_this_call":0,"rejection":{"error":"piece enters at 25-up slope but the track here is flat; add a slope transition piece first","index":0,"piece":"left_vertical_loop"},"total_placed":24}
  12. place_pieces
    {"pieces":["flat_to_up_25","left_vertical_loop","down_25_to_flat","banked_left_turn_5","banked_left_turn_5"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":0,"slope":0,"x":32,"y":59,"z":176},"placed_this_call":3,"rejection":{"error":"piece enters left-banked but the track here is unbanked; add a banking transition piece first","index":3,"piece":"banked_left_turn_5"},"total_placed":27}
  13. place_pieces
    {"pieces":["flat_to_left_bank","banked_left_turn_5","banked_left_turn_5","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":37,"y":53,"z":176},"placed_this_call":7,"total_placed":34}
  14. valid_next_pieces
    {"cursor":{"bank":0,"dir":2,"slope":0,"x":37,"y":53,"z":176},"valid_pieces":["flat","end_station","begin_station","middle_station","flat_to_up_25","flat_to_down_25","left_turn_5","right_turn_5","flat_to_left_bank","flat_to_right_bank","s_bend_left","s_bend_right","left_turn_3","right_turn_3","left_corkscrew_up","right_corkscrew_up","flat_to_up_60","flat_to_down_60","brakes","booster"]}
  15. place_piece
    {"piece":"left_corkscrew_up"}
    {"circuit_closed":false,"cost":2500,"cursor":{"bank":15,"dir":1,"slope":0,"x":38,"y":55,"z":256},"pieces_placed":35,"placed":"left_corkscrew_up"}
  16. valid_next_pieces
    {"cursor":{"bank":15,"dir":1,"slope":0,"x":38,"y":55,"z":256},"valid_pieces":["left_corkscrew_down","right_corkscrew_down"]}
  17. place_pieces
    {"pieces":["right_corkscrew_down","flat_to_down_25","down_25","down_25_to_flat","s_bend_right","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","s_bend_left","flat_to_down_25","down_25","down_25_to_flat","s_bend_right","brakes","brakes","flat_to_left_bank","banked_left_turn_5","banked_left_turn_5","left_bank_to_flat"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"placed_this_call":20,"total_placed":55}

  18. Circuit closed on the first try. Banking a score now.

  19. finish_and_test
    {"bounds":{"max_tile_x":64,"max_tile_y":60,"max_z":360,"min_tile_x":29,"min_tile_y":53,"min_z":112},"placed_pieces":["begin_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},"up_25_to_flat","flat_to_down_25","down_25","down_25_to_down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_left_bank","banked_left_turn_5","banked_left_turn_5","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_down_25","down_25","down_25_to_flat","s_bend_right","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","s_bend_left","flat_to_down_25","down_25","down_25_to_flat","s_bend_right","brakes","brakes","flat_to_left_bank","banked_left_turn_5","banked_left_turn_5","left_bank_to_fl… (1888 chars)

  20. Excitement 6.17 banked. Now a bigger v2: 3 loops, 2 corkscrew pairs, airtime hill, 360° helix.

  21. demolish
    {"demolished":0}
  22. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":60}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"ride_id":0}
  23. place_pieces
    {"pieces":["begin_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","banked_left_turn_5","banked_left_turn_5","left_bank_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":30,"y":51,"z":128},"placed_this_call":33,"total_placed":33}
  24. place_pieces
    {"pieces":["flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_helix_up_large","right_bank_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":4,"dir":0,"slope":0,"x":47,"y":49,"z":144},"placed_this_call":16,"rejection":{"error":"Twister Roller Coaster 1 in the way","index":16,"piece":"right_helix_up_large"},"total_placed":49}

  25. Helix collision — rerouting the return leg north with an extra corkscrew pair.

  26. place_pieces
    {"pieces":["right_bank_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_left_bank","banked_left_turn_5","banked_left_turn_5","left_bank_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat","flat","flat","flat","flat_to_left_bank","banked_left_turn_5","left_bank_to_flat","flat","flat","brakes","brakes","brakes","brakes","flat_to_left_bank","banked_left_turn_5","left_bank_to_flat"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"placed_this_call":36,"total_placed":85}
  27. finish_and_test
    {"bounds":{"max_tile_x":64,"max_tile_y":60,"max_z":360,"min_tile_x":26,"min_tile_y":44,"min_z":112},"placed_pieces":["begin_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","banked_left_turn_5","banked_left_turn_5","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat… (2363 chars)

  28. Excitement 6.99, intensity 9.93. Adding two more airtime hills for length/air time.

  29. demolish
    {"demolished":0}
  30. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":60}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"ride_id":0}
  31. place_pieces
    {"pieces":["begin_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","banked_left_turn_5","banked_left_turn_5","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_left_bank","banked_left_turn_5","banked_left_t… (1271 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":47,"y":47,"z":112},"placed_this_call":59,"total_placed":59}
  32. place_pieces
    {"pieces":["flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","banked_left_turn_5","left_bank_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","brakes","brakes","flat_to_left_bank","banked_left_turn_5","left_bank_to_flat"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"placed_this_call":26,"total_placed":85}
  33. finish_and_test
    {"bounds":{"max_tile_x":64,"max_tile_y":60,"max_z":360,"min_tile_x":26,"min_tile_y":44,"min_z":112},"placed_pieces":["begin_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","banked_left_turn_5","banked_left_turn_5","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat… (2414 chars)

  34. Intensity crossed 10. Let me try widening the fast 180° turns into large helices to cut lateral G (which carries an excitement penalty above 2.80).

  35. demolish
    {"demolished":0}
  36. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":60}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"ride_id":0}
  37. place_pieces
    {"pieces":["begin_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_up_large","left_bank_to_flat"]}
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":45,"y":44,"z":128},"placed_this_call":54,"total_placed":54}
  38. place_pieces
    {"pieces":["flat_to_down_25","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","flat","flat_to_left_bank","banked_left_turn_5","left_bank_to_flat","flat","flat","brakes","brakes","brakes","brakes","flat_to_left_bank","banked_left_turn_5","left_bank_to_flat"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"placed_this_call":27,"total_placed":81}
  39. finish_and_test
    {"bounds":{"max_tile_x":64,"max_tile_y":60,"max_z":360,"min_tile_x":26,"min_tile_y":44,"min_z":112},"placed_pieces":["begin_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_u… (2330 chars)

  40. Best yet: 7.06. Lateral G is stuck at 2.84 — likely the fast banked turn just before the station. Let me brake before it.

  41. demolish
    {"demolished":0}
  42. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":60}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"ride_id":0}
  43. place_pieces
    {"pieces":["begin_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_up_large","left_bank_to_flat","flat_to_down_25","do… (1345 chars)
    {"circuit_closed":false,"cursor":{"bank":0,"dir":2,"slope":0,"x":56,"y":47,"z":112},"placed_this_call":64,"total_placed":64}
  44. place_pieces
    {"pieces":["brakes","brakes","brakes","brakes","brakes","flat_to_left_bank","banked_left_turn_5","left_bank_to_flat","flat_to_up_25","up_25_to_flat","flat_to_down_25","down_25_to_flat","brakes","brakes","flat_to_left_bank","banked_left_turn_5","left_bank_to_flat"]}
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"placed_this_call":17,"total_placed":81}
  45. finish_and_test
    {"bounds":{"max_tile_x":64,"max_tile_y":60,"max_z":360,"min_tile_x":26,"min_tile_y":44,"min_z":112},"placed_pieces":["begin_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_u… (2299 chars)

  46. Brakes stalled the train — and lateral G was already 2.84 before them, so it comes from earlier elements. Reverting to the v4 layout with one extra airtime hill.

  47. demolish
    {"demolished":0}
  48. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":60}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"ride_id":0}
  49. place_pieces
    {"pieces":["begin_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_up_large","left_bank_to_flat","flat_to_down_25","do… (1630 chars)
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"placed_this_call":81,"total_placed":81}
  50. finish_and_test
    {"bounds":{"max_tile_x":64,"max_tile_y":60,"max_z":360,"min_tile_x":26,"min_tile_y":44,"min_z":112},"placed_pieces":["begin_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_u… (2331 chars)

  51. Stalled again — the single brake robs too much speed for the last hill. Removing it.

  52. demolish
    {"demolished":0}
  53. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":60}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"ride_id":0}
  54. place_pieces
    {"pieces":["begin_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_up_large","left_bank_to_flat","flat_to_down_25","do… (1628 chars)
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"placed_this_call":81,"total_placed":81}
  55. finish_and_test
    {"bounds":{"max_tile_x":64,"max_tile_y":60,"max_z":360,"min_tile_x":26,"min_tile_y":44,"min_z":112},"placed_pieces":["begin_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_u… (2364 chars)
  56. best_result
    {"bounds":{"max_tile_x":64,"max_tile_y":60,"max_z":360,"min_tile_x":26,"min_tile_y":44,"min_z":112},"placed_pieces":["begin_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_u… (2330 chars)
  57. demolish
    {"demolished":0}
  58. new_ride
    {"dir":0,"ride_type":51,"x":60,"y":60}
    {"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"ride_id":0}
  59. place_pieces
    {"pieces":["begin_station","middle_station","end_station",{"chain":true,"piece":"flat_to_up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},{"chain":true,"piece":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_up_large","left_bank_to_flat","flat_to_down_25","do… (1592 chars)
    {"circuit_closed":true,"cursor":{"bank":0,"dir":0,"slope":0,"x":60,"y":60,"z":112},"placed_this_call":81,"total_placed":81}
  60. finish_and_test
    {"bounds":{"max_tile_x":64,"max_tile_y":60,"max_z":360,"min_tile_x":26,"min_tile_y":44,"min_z":112},"placed_pieces":["begin_station","middle_station","end_station",{"chain":true,"t":"flat_to_up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},{"chain":true,"t":"up_25"},"up_25_to_flat","flat_to_down_25","down_25_to_down_60","down_60","down_60","down_60_to_down_25","down_25_to_flat","flat_to_up_25","left_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_left_bank","left_helix_down_large","left_bank_to_flat","flat_to_up_25","right_vertical_loop","down_25_to_flat","left_corkscrew_up","right_corkscrew_down","flat_to_up_25","left_vertical_loop","down_25_to_flat","flat_to_up_25","up_25","up_25_to_flat","flat_to_down_25","down_25","down_25_to_flat","flat_to_right_bank","right_helix_up_large","right_bank_to_flat","flat_to_down_25","down_25_to_flat","flat_to_left_bank","left_helix_u… (2330 chars)

  61. Final build restored and re-verified at the best score. **Best coaster: an 81-piece steel twister — 28 m chain lift into a triple-60° plunge, then 3 vertical loops, 3 corkscrew pairs (6 inversions), two wide banked helices, and 4 airtime hills over 674 m — excitement 7.06 (intensity 10.07, nausea 6.14, similarity 0.46).** Notes from the round: - 6 tested circuits: 6.17 → 6.99 → 6.91 → **7.06** → 6.97, plus two builds that stalled (untested) when brakes before a late hill left the train too slow to crest it. - Max lateral G sat at 2.84 in every variant and I couldn't trace it to the closing banked turn (it registered before the brakes), so the small lateral-G penalty remained; widening the two fast 180° turns into large helices is what took it from 6.99 to 7.06. - Counterintuitively, the 4-brake tail (avg speed ~199k) scored better than the 2-brake tail (~278k), so extra airtime hills late in the layout did not pay off.

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